Before I mention about the IPv6 firewall issue.....I would like to give a feedback on Archer A6 Internet LED refuses to change from orange/red to green after enabling IPv6 and router IPv6 firewall doesn't work. Steps to reproduce, begin by logging into the router:

Now then, problems. As I wrote before, the Internet LED refuse to change from orange/red to green after enabling IPv6 (I verified IPv6 Internet connectivity is successfully established). In addition, with IPv6 enabled, the 'Check for upgrade' section at System Tools, Firmware Upgrade will always return 'No Internet Connection'. Please fix these issue.

Note: I had upgraded the Archer A6 v2.0 firmware to 1.1.2 Build 20190403 rel.65811(5553) in which the changelog mentioning something about Improve the security of device that doesn't fix the IPv6 firewall at all......

Moving on to IPv6 firewall......

Instead of the A6 router IPv6 firewall filtering out the uninitiated inbound connection, my software firewall (Comodo firewall) is hit with port scans by random devices. I run a port scan test using https://ipv6.chappell-family.com/ipv6tcptest/ and my Comodo firewall is receiving and blocking all those port scan attempts. You can see the comodo log in picture below.

Comodo firewall is sure doing a good job here.

If I use my previous C1200, the Comodo Firewall will not even be hit by IPv6 port scans at all as the C1200 router will filter it off before reaching my devices.

Thing is looking bad for my android based phones with Archer A6:

If I use Archer C1200, the page will show all green STLTH on my android phones on IPv6 connection.

This is clear Archer A6 IPv6 firewall doesn't not function properly. I sent an email to TP-Link support on 4 April 2019, but there is no further reply other than automated message with "TPLINK SUPPORT #182050". The latest firmware published on 2019-04-17 Archer A6(US)_V2_190403 1.1.2 Build 20190403 rel.65811(5553) doesn't fix the IPv6 firewall and the Internet LED status.

2.May i know did try to visit ipv6-test.com for confirm ipv6 is working?

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Thus, I sent several screenshots on the 'Basic' menu screenshot, 'Advanced'-->Status for IPv4 , 'Advanced'-->Status for IPv6 as well as screenshot of https://ipv6-test.com/ as requested by TP-Link support team.

May 13, 2019.

Received another reply from TP-Link

[quote]

Thank you very much for using TP-Link Product

Hi Sir

Thanks you information.

May you try restart your router?

After restart still same, please try open CMD and try key in the ipconfig/release6---ipconfig/renew6

[/quote]

............I was like.............what make the team think I never restart the router? I had been restarting, hard resetting, reconfiguring several times before and it doesn't fix anything.....and those two ipconfig commands only renew global IPv6 prefix address for devices with Microsoft Windows......it is clear from my first post that the issue lies with the A6 firmware and not my devices.

Updated to it immediately and it displays 1.1.3 Build 20190712 rel.56946(5553)

......it still exhibits same problems with IPv6 enabled (ipv6 firewall issue, Internet LED not changing color to green with ipv6 enabled with custom ipv6 dns, unable to check for firmware upgrade at router interface). Basically, the new firmware doesn't fix any of the reported issues at all.